Rosa woodsii subsp. puberulenta and variety ertterae (Rosaceae), New in Western North America

Walter H. Lewis ^[1] ; Barbara Ertter ^[2]
1. [1] University of Washington
  
  University of Washington
  
  Estados Unidos
2. [2] University of California, Berkeley
  
  University of California, Berkeley
  
  Estados Unidos
Localización: Novon: a journal for botanical nomenclature, ISSN 1055-3177, Vol. 20, Nº. 1, 2010, págs. 47-52
Idioma: inglés
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Resumen
- An additional subspecies and two new varieties of Rosa woodsii Lindl. (Rosaceae) are recognized in western North America. Rosa woodsii subsp. puberulenta (Rydb.) W. H. Lewis & Ertter, characterized by an open habit and moderately curved prickles, is the predominant bottomland subspecies occurring in the Colorado Plateau of Colorado, Utah, Arizona, Nevada, New Mexico, and Wyoming. Atypical unarmed populations of R. woodsii subsp. arizonica (Rydb.) W. H. Lewis & Ertter endemic to Oak Creek Canyon in the Mogollon Rim region of Coconino County, Arizona, are described as R. woodsii var. ertterae W. H. Lewis. The new combination R. woodsii var. arizonica (Rydb.) W. H. Lewis is provided for the remainder of R. woodsii subsp. arizonica. A key to the six subspecies of R. woodsii is provided.